Glazing of Bores on Older Tractors

[cosmiccrofter]

Chewing the fat with a friend about older tractors glazing their bores when doing stationary work at tickover/fast tickover.

He said that it wouldn't apply to direct injection engines, I'm not so sure, but willing to be convinced.

Any mechanics who can give a definitive answer?

 

[Boohoo]

I'm not a mechanic but direct injection diesels can glaze the bores when they're not worked hard enough. No idea whether indirect injection diesels are worse for it.

 

[Timbo]

I'm not a mechanic but direct injection diesels can glaze the bores when they're not worked hard enough. No idea whether indirect injection diesels are worse for it.

Type of injection will make no odds to it at all. Glazing comes about from inadequate ring pressure against the bore and lack of heat in the engine. Generators are also very at risk of it, which leads to wet stacking, when they are run at low to no load, especially in cold conditions.

 

[ford 7810]

Chewing the fat with a friend about older tractors glazing their bores when doing stationary work at tickover/fast tickover.

He said that it wouldn't apply to direct injection engines, I'm not so sure, but willing to be convinced.

Any mechanics who can give a definitive answer?

Our 5000 got glazed up in its first winter 1975/6 ticking over bringing the cows in to milk ,it was the only tractor with a cab on ,all so ticking over to warm up before taking the muck out one load a day ,foraging next summer didn’t correct it as father said it would it started using oil and difficult to start, new liners and piston rings after it went porous different tractor altogether after hammering the living daylights out of it never let it happen since and forget the warm up part just gently to work and get on with it then. all diesel engines like hard work.

 

[Bucks Boy]

My 3000 glazes up every winter ticking over on Browns Log Chop. Even starts to spit oil out of the exhaust! Half an hour in the spring on the topper and it’s running perfect again. Doesn’t seem to use any oil.

 

[Oliveau]

Back in the 70's in a new job I took on a 188 which was 3 months old and the foreman had been using it just pootling about. Once I got hold of it and started work it hard it was going through a 1-2 pints of oil/day The dealer diagnosed glazed bores and had it in to 'remedy' but when it came back it was just as bad. Once I got my 7000 the 188 was passed on to the lad, who despite being told to check the oil daily seized it up.

 

[trebornella]

All diesels will glaze the bores if not worked hard enough. A few hours on a dynomometer will help if they're not too glazed. Always used it when overhauling an engine, best way to bed it in and check for any leaks. Try using a cheap (rougher ) oil for a few hours, some of the premium brands have too many additives. You used to be able to buy 'running in oil', not sure if anyone still makes it. Diesels thrive on hard work. Obviously stick to the manufacturers recommended oil if still in warranty.

 

[ridger]

All diesels will glaze the bores if not worked hard enough. A few hours on a dynomometer will help if they're not too glazed. Always used it when overhauling an engine, best way to bed it in and check for any leaks. Try using a cheap (rougher ) oil for a few hours, some of the premium brands have too many additives. You used to be able to buy 'running in oil', not sure if anyone still makes it. Diesels thrive on hard work. Obviously stick to the manufacturers recommended oil if still in warranty.

I prefer a slurry pump, at least your getting something done for the diesel

 

[Lincsman]

Back in the 70's in a new job I took on a 188 which was 3 months old and the foreman had been using it just pootling about. Once I got hold of it and started work it hard it was going through a 1-2 pints of oil/day The dealer diagnosed glazed bores and had it in to 'remedy' but when it came back it was just as bad. Once I got my 7000 the 188 was passed on to the lad, who despite being told to check the oil daily seized it up.

Dad bought a New MF168 in 1973, it went ploughing and doing all sorts of hard normal work, it always used a litre of oil per week, put me off perkins for life!

 

[Lincsman]

In have heard you dust Ajax into the air intake to bust glaze... anyone tried it?

 

[trebornella]

I've seen it done with Vim, made it cough a little!!!

 

[essexpete]

Dad bought a New MF168 in 1973, it went ploughing and doing all sorts of hard normal work, it always used a litre of oil per week, put me off perkins for life!

Are you sure it used a litre in 1973?

 

[essexpete]

In have heard you dust Ajax into the air intake to bust glaze... anyone tried it?

I have done it to a Perkins 6.354 in an old Hymac. Not sure if it did an good. Cousin used the method in Africa in a couple of Deutz powered ADTs. They were smoking blue and burning oil with too much idling. He reckoned they were improved considerably. Only a spoonful down the air intake, followed by oil change.

 

[Timbo]

I've seen it done with Vim, made it cough a little!!!

Also seen it done. Improved the bores but jammed the rings up - burnt oil for fun after.

 

[ford 7810]

Dad bought a New MF168 in 1973, it went ploughing and doing all sorts of hard normal work, it always used a litre of oil per week, put me off perkins for life!

neighbour had a 185 and a 188 and both drank oil our 165 never used a drop it maybe the liners are different. When ford put the three cylinder perkins In the Dexta they used cast liners instead of chrome .the chrome would use oil and cast didn’t in there trials

 

[Lincsman]

Are you sure it used a litre in 1973?

Yes, no oil light on those only a pressure gauge, if you forgot to dip it (dad??) you could see it low on the gauge... which wouldn't help!

 

[tomlad]

Dad used to talk about the garage using carborundum powder in intake.

 

[Fowler VF]

Serviceman's manual for Caterpillar D7 (1940's version) shows a special de-glazing material, in a proper Cat container. It was just Ajax!! Instructions say to add a small amount into the air intake after removing filter. Worked OK on older engines, but I don't think a modern engine with tighter tolerances would like it.

We use old style V8 Big Block Chevvy (petrol) engines in our wood gas power station. Always use running in oil for the first 80 hours after a rebuild, they will glaze otherwise.

 

[ford 7810]

Serviceman's manual for Caterpillar D7 (1940's version) shows a special de-glazing material, in a proper Cat container. It was just Ajax!! Instructions say to add a small amount into the air intake after removing filter. Worked OK on older engines, but I don't think a modern engine with tighter tolerances would like it.

We use old style V8 Big Block Chevvy (petrol) engines in our wood gas power station. Always use running in oil for the first 80 hours after a rebuild, they will glaze otherwise.

So there running on gas basically 24 hours a day? how long (hours ) between rebuilds.local farm has 66000 hours on a generator engine but don,t know any details.

 

[PSQ]

A few hours on a dynomometer will help if they're not too glazed.

I watched an engine tuner "bed in" a freshly built Honda Type R race engine on the dyno on high load to "throw the rings out".
Sounded like a wounded animal, but it race trim it revved to 9,200 rpm with the power and torque curves still rising.